package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 对前端传来的铭文密码进行md5加密处理
        //md5处理
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    public void save(EmployeeDTO employeeDTO) {
//        System.out.println("当前线程id"+Thread.currentThread().getId());

        Employee employee=new Employee();

       //对象属性copy  将数据传入employ
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置默认status 1是启用
        employee.setStatus(StatusConstant.ENABLE);

        //设置默认密码 123456  md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        /*//设置创建时间+修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //设置创建人+修改人id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
*/
        //调用持久层保存数据
        employeeMapper.insert(employee);

    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //基于limit关键字实现分页 select * from employee limit 0,10
        //开始分页 PageHelp插件  startPage(页码，每页记录数)
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //pagehelper通过ThreadLocal来保存数据 直接传给page
        Page<Employee> page =employeeMapper.pageQuery(employeePageQueryDTO);
        long pages = page.getTotal();
        List<Employee> result = page.getResult();

        return new PageResult(pages,result);
    }

    /**
     * 启用、禁用员工账号
     * @param status
     * @param id
     * @return
     */
    public void startOrStop(Integer status, Long id) {
        //build构造器
        Employee employee= Employee.builder()
                .status(status)
                .id(id)
                .build();

       employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    public Employee getById(Long id) {
        Employee employee=employeeMapper.getById(id);
        employee.setPassword("***");
        return employee;

    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     * @return
     */
    public void update(EmployeeDTO employeeDTO) {
        //属性拷贝  employeeDTO->employee
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
       /* //设置修改时间
        employee.setUpdateTime(LocalDateTime.now());
        //修改人id
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.update(employee);
    }

}
